AIRBAG SYSTEM, Diagnostic DTC:B1620/21

DTC Code DTC Name
B1620/21 Side Airbag Sensor RH Circuit Malfunction

DESCRIPTION

The side collision sensor RH circuit (bus 1) consists of the airbag sensor assembly, door side airbag sensor RH, No. 1 side airbag sensor RH and No. 2 side airbag sensor RH.

The door side airbag sensor RH, No. 1 side airbag sensor RH and No. 2 side airbag sensor RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.

DTC B1620/21 is stored when a malfunction is detected in the No. 1 side airbag sensor RH.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1620/21 Side Airbag Sensor RH Circuit Malfunction

Any of the following conditions is met:


  • No. 1 side airbag sensor RH malfunction

  • Airbag sensor assembly malfunction

  • No. 1 side airbag sensor RH

  • Airbag sensor assembly

 Does not apply to test/check mode
DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition Ignition switch ON ○ ○
Malfunction Status No. 1 side airbag sensor RH malfunction ○ -
Airbag sensor assembly malfunction - ○
Detection Time - -
Number of Trips 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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PROCEDURE


  1. CHECK NO. 1 SIDE AIRBAG SENSOR RH


    1. A001XYIC02
      *1 No. 1 Side Airbag Sensor LH
      *2 Airbag Sensor Assembly

      Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Interchange the No. 1 side airbag sensor RH with LH and connect the connectors.

    4. Connect the cable to the negative (-) battery terminal.

    5. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the ignition switch off.

    7. Turn the ignition switch ON, and wait for at least 60 seconds.

    8. Check for DTCs.

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      Body Electrical > SRS Airbag > Trouble Codes

      Tech Tips

      Codes other than DTCs B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

      Result
      Result Proceed to
      DTC B1620/21 is output. A
      DTC B1625/22 is output. B
      DTCs B1620/21 and B1625/22 are not output. C

    9. Turn the ignition switch off.

    10. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    11. Return the No. 1 side airbag sensor RH and LH to their original positions and connect the connectors.


    A

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    B

    REPLACE NO. 1 SIDE AIRBAG SENSOR RH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here